package com.sky.service.impl;

import com.github.pagehelper.util.StringUtil;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {


    @Autowired
    private OrderMapper ordersMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /*
    * 营业额统计
    * @param begin
    * @param end
    * */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        List<Double> turnoverList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals( end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Double  turnover = ordersMapper.getOrdersStatistics(beginTime, endTime, Orders.COMPLETED);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        TurnoverReportVO turnoverReportVO = TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
        return turnoverReportVO;
    }

    /*
    * 用户统计
    * @param begin
    * @param end
    * */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals( end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);
            Integer totalUser = userMapper.getUser(map);
            map.put("begin", beginTime);
            Integer newUser = userMapper.getUser(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        UserReportVO userReportVO = UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();

        return userReportVO;
    }

    /*
    * 订单统计
    * @param begin
    * @param end
    * */
    @Override
    public OrderReportVO getOrderReportVO(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals( end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        Integer totalOrdersCount = 0;
        Integer validOrdersCount = 0;

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);


            Integer orderCount = ordersMapper.getOrdersByTime(map);
            totalOrdersCount += orderCount;
            orderCountList.add(orderCount);


            map.put("status", Orders.COMPLETED);
            Integer validOrderCount = ordersMapper.getOrdersByTime(map);
            validOrdersCount += validOrderCount;
            validOrderCountList.add(validOrderCount);
        }
        Double orderCompletionRate = 0.0;
        if(totalOrdersCount != 0){
            orderCompletionRate = validOrdersCount.doubleValue() / totalOrdersCount;
        }
        OrderReportVO orderReportVO = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrdersCount)
                .validOrderCount(validOrdersCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

        return orderReportVO;
    }


    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> list = ordersMapper.getSalesTop10(beginTime, endTime);
        List<String> nameList = list.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList = list.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        SalesTop10ReportVO salesTop10ReportVO = SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList, ","))
                .numberList(StringUtils.join(numberList, ","))
                .build();
        return salesTop10ReportVO;
    }


    @Override
    public void exportBusinessData(HttpServletResponse response) {
        // 1. 查询数据库，获取营业数据----查询近三十天的营业数据
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);


        // 查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));

        // 2. 将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            // 创建Excel对象
            XSSFWorkbook workbook = new XSSFWorkbook(in);

            // 获取表格文件的Sheet页
            XSSFSheet sheet = workbook.getSheet("Sheet1");

            // 填充数据
            sheet.getRow(1).getCell(1).setCellValue("时间：" + begin + "至" + end);

            // 获取第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            // 获取第五行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());


            //填充明细数据

            for (int i = 0;i < 30;i++){
                LocalDate date = begin.plusDays(i);

                // 查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                // 获取某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }







            // 3. 通过输出流将Excel文件下载到客户端
            ServletOutputStream out = response.getOutputStream();
            workbook.write(out);

            // 释放资源
            out.close();
            workbook.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }


    }
}
